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July 23, 1929. H. c. MouGEY OIL HEATER AND CRANK CASE VENTILATOR 2 Sheets-sheet Filed Jan. 6, 1926 v my@ WE .www ,a MW u K. m F U l M R R A H un www 5 HJ e .n fo t. a

July 23, 1929. H. c. MoUGEY OIL HEATER AND CRANK CASE VENTILATOR Filed Jan. 6, 1926 2 Sheets-Sheet wuanfoz HARRY CLIFFORD NOUGEY K @51a mfg 7 Patented July 23, 1929'.

U ET is HARRY CLIFFORD MOUGEY, OF DETROT, MICHIGAN, ASSGNOR TO GENERAL MOTORS RESEARCH CORPORATION, OF DETROIT, MICHIGAN, .A CORPORATION OF DELA WARE.

OIL HEATER AND CRANK-CASE VENTLATOR.

Application filed January 6, 1926. Serial No. 79,631.

This invention relates to an oil heater and a crank case ventilator.

It is an object of the invention to provide means for heating the oil in the crank case. This is especially to be desired when the motor is cold and the oil is very thick as it is on cold winter mornings. A further object is to overcome the dilution of the oil in the crank case. It is well known that the oil in the crank case becomes seriously diluted with gasolene and water which escape around the piston from the combustion chamber. Dilution from this source is quite considerable when the motor is cold. A further object is to prevent the dilution by constructing the motor with conduits by which the oil adulterants such as gas and water are carried to the motor by way of the carburetor. A still further object is to provide the crank case with a convenient means of heating to aid in releasing from the oil the relatively volatile gas for ab sorption by the air current which is passing through the crank case.

Briefly stated, the invention aims to producel an air current from the breather pipe, through the crank case, and through passages provided therefor to the intake of the carburetor the air current being produced by the suction of the motor. As the air passes through the crank case it absorbs gasolene and water as well as the conditions therein permit, which gasolene and water serve to dilute the oil and interfere with its proper function of lubrication. This action will take place very well when the motor is warm but when it is cold absorption by the air current is not sufficient to remove all the diluting substances. To overcome this diiiculty yit is proposed toV take hot gases from the exhaust manifold to a heater secured underneath the crank casing, which heater serves the further purpose of heatingthe oil when the motor is cold and thereby aiding in starting the engine.

The invention will now be described in detail, reference being made to the accompanying drawing.

In the drawing, Figure 1 is a side elevation of an explosive motor, parts being shown' in section. Figure 2 is a plan view of the heater. Figure 3 is a vertical section of line 3 3 Figure 1. Figure 4 is a-longitudinal section through the heater.

Referring to the drawing, numeral 1 is a gas engine having a crank case 9. including an oil pan 3. Numeral 4 represents the carburetor and 5 the exhaust manifold. Above the head 6 of the motor is a cover 7 designed to enclose the valve actuating rocker arms. These rocker arms being no part of the in vention are omitted from the drawing.

It is proposed to provide means to heat the crank ease oil at low engine speed. To that end a heater 8 is stamped up from sheet metal as shown in Figure 2. rlhe heater is constructed with an inlet 9 and an outlet 10. Vithin the heater a tortuous passage made by the pressed up portions 1l which engage the lower surface of the oil pan to which the heater is secured preferably by welding as shown by 12. Entering the heater at the inlet 9 is a pipe 13 which is connected to the exhaust manifold 5 near its front end by means of a pipe 14 which is joined to pipe 18 in the upper edge of the oil pan so that when the latter is removed the passages 13 and 14 are disconnected. At the junction of pipe 14 with the manifold is a butterfly valve 15 which is connected by an arm 1G and a link 17 to the throttle valve of the carburetor in such a manner that the valve 15 is completely or practically completely closed except when the throttle valve is open but slightly. In other words the valve 15 is closed during high engine speeds. This will serve the purpose of passing the hotgases from the manifold 5 to the heater at low engine speeds and when the motor isV idling to thereby warm the oil. On cold mornings it will be found very useful to thus thaw out the oil by use of the hot exhaust gases. After the throttle is opened and the engine speeded, the passage from manifold 5 to the heater is automatically closed.

It will be observed that the opening and closing movements of the butterfly valve 15 are accompanied by opposite movements of the throttle valve. ln other words, if the throttle approaches a closed position, the valve 15 begins to open and is most widely opened in the closed position of the throttle; also if the throttle opens from its idling position to a speed position, the valve 15 closes. The flow of exhaust gas to the heater thns various inversely as the iiow of the mixture from the carburetor to the motor. This has the advantage of heating the oil when heat is needed and of cutting oli' the heat when llt) f f valve 28.

the heat Would be objectionable, as it Would be if the engine becomes warmed up. l

It should be added also that the oil circulation through the pump, When the engine is cold, is made possible by this heating of' the crank case. lii/Tlien'the oil pump is located adjacent the heater, as it is shown to be. by reference character 30, the direct application of heat to the pump renders the heating additionally effective. The heating of the oil serves also to release the gasolene and Water :roin the oil so that it may be more readily absorbed by the air current provision for which ivill be now described.

Associated with this oil heating arrangement is the means for passing an air current through the crank ease to absorb the gasolene and Water vapor. For that purpose the niotors suction is relied. on and the closed conduit is arranged between the carburetor air intake and the crank casing, the breathei' being made use of for the air `inlet to the crank case. Illustrating this feature there is shoivn a breather 18 opening into a crank case. The air entering the crank case gathers up such Water vapor and gas as it may and passes out through an opening 19 and up through passages 2O and 2l into the chainbcr 23 surrounding the' rocker arms` and `Within the cover 7. l From this space a Vpipe 24 connects With the coredpassage 25 from which the gases pass through a pipe 2G con.- necting the said passage with the carburetor intake at 2'( at a point adjacent the choker By means of the structure shown and de-v scribed, meansare provided tol greatly im, prove the lubrication, by ridding the oil oit' diluting media such as Water and gasolene. The oil is quickly heated np when the motor is cold. The gases which pass the piston ring ai'e gathered up in the crank case and are disposed of through the carburetor and finally pass ofl' through the exhaust.

l regard the position of the passage 25 of considerable importance. rFhis passageway being Within the engine block does away .vith the necessity ot any disfiguring pipes on the outside of the motor. The passageway being Within the Warm motor block tends also to keep'the gasolene and Water in the form of vapor and prevents condensation. The disposal of these gases ,is thus made more easy.

I claim:

l. ln va-gas engine, a crank case includ-g the heater and means controlling the flow ofthe exhaust gas to the heater, said means be ing connected to and automatically; controlled by the throttle of the carburetor. '2. In a gas engine, a crank case including Van oil pan, a cylinder block, a carburetor, an

exhaust manifold, a heater secured to the oil pan, a conduit from the exhaust pipe to the heater, avalve in the conduit, a link connecting the conduit valve with the throttle of the carburetor.

3. In a gas engine, a crank case including an oil pan., a cylinder block, a carburetor and an exhaust manitold, a heater secured to the oil pan, the heater comprising a stamped piece of sheet metal, its upper surface providiiig, when secured to the oil pan, a tortuous passage, an inlet, anl out-let, a conduitfrom the exhaust-manifold to the heater, a valve in the conduit, means whereby the valve is connected to and automatically operated by the carburetor throttle.

et. In a. gas engine, a crank case including an oil pan and a breather, a cylinder block thereon, a cov-er thereover, a carburetor, an

exhaust manifold, the carburetor having afthrottle and choke' valve, a heater secured beneath the oil pan, a pipe connecting the heater and the exhaust manifold, a valve in the pipe, a link connecting the valve with the throttle valve, a conduit extending from the crank case to the cover chamber, the block having a passage therethrough extending troni the space Within the cover to the i11- take ot the carburetor adjacent the choke alve.

5. ln a engine, a crank case including an oil-pan, a cylinder, a carburetorhaving a throttle valve, an exhaust manifold, a heat.- er for the oil pan, a conduit romthe eX- haust manifold to the heater, a valveY in the conduit, means connecting the throttle valve and conduit valve arranged for the lsimultaneous and reverse actuation of the tivo valves. i

6. In a gas engine, a `crank case including an oil pan, cylinders, a carburetor supplying mixture to the cylinders, a heater for the oil pan, means for-supplying heated fluid to the heater, and the means controlling the flow off heated fluid to the heater automatically controlled by and connected to the carburetor throttle. f i

7. throttle valve, oil reservoir and exhaust manifold, a heater for the oil reservoir, aL conduit for leading'` exhaustgases from theV manif old to the heater, aV valve controlling crate inversely with respect to the other.v

8. .ln a gas engine provided with the usual oil rest` 'voir and throttle valve, a heater for the oil reservoir, means for supplying heated HARRY CLIFFORD MOUGEY.

.il engine comprising the .usualv 

